Armor-piercing projectile.



A.`J. SODEN.

. Y 1913. 1,095,173. Patented Apr. 28, 1914y A. J. SODEN. ARMOR PIERCING. PROJECTILE. APPLICATION FILED 1.111,7. 1913.

1,095, 1 73. v Patented A111128, 1914.

2 SHEETS-SHEET 2.

COLUMBIA PLANCGRAPH co.. WASHINGTON. D. c.

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ALFRED J'. SODEN,` 0F .NEWARIL NEW JERSEY, ASSIG-NOR TO- CRUCIBLE.` STEEL COM'- PANY OF AMER-IGA, 0F PITTSBURGH, PENNSYLVANIA.

ARMOR-PIERCING- PROJ'ECTILE. Y

Specification of Letters Patent.

Patented Apr. 28, 1914.

Application led January 7, 19113. Serial No. 740,742.

To all whom t may concern Beit known that I, ALFRED J. SODEN, a citizen of the United States, residing at Newark, in the county of Essex and State of `New Jersey, have invented certain new and useful Improvements in Armor- Piercing Projectiles, of which the following is aspecification.

My invention relates to improvements in armor-piercing projectiles, and it consists in the constructions,combinations and arrangements herein described and claimed.

An object of my invention is to provide an improved armor-piercing projectile, constructed to present a maximum resistance throughout to the compression and shearing strains incident to impact, and to decrease the velocity and energy required for penetration. v

A further object of my invention is to provide an improved armor-piercing projectile which will efficiently bite into the armor-piercing plate at large angles of incidence, and in which failure of the projectile through a whipping action and crushing and shearing strains will be minimized under all conditions of impact.

In the accompanying drawings, forming a part of this application and in which similar reference symbols indicate corresponding parts in the several views: Figure l is an axial section, illustrating one embodiment of my invention applied to a l-inch projectile; Fig. 2 is a fragmentary section, illustrating a preferred manner of notching the base of the band score; Fig. 3 is a diagram-V matical view, showing the form of the axial elements of the contour of the projectile point, and Fig. 4i is a diagrammatical view, drawn to scale, showing the variable'curve comprising the tip portion of said axial elements.

Referring to the drawings, 1 indicates the cylindrical body portion of a projectile provided wit-h my preferred point 2, which is shown of less length than the standard ogival point having a uniform curvature radius of two calibers. The projectile is provided with a band 3, and a base plug 4 constructed to screw tightly to place against a suitable gasket.

ln my improved projectile, the point comprises a base portion 5 having a fixed radius of longitudinal curvature of approximately three calibers, and preferably slightly less; said base portion having a length substantially equal to .85 caliber. The point is formed with a tip portion having a length of substantially .48 caliber; all axial elements of the tips contour comprising a variable curve blunter than the curvature of a standard naval ogival point having a uniform curvature radius of two calibers. This improved construction provides a projectile having a point of less length than a standard ogival point having a uniform curvature radius of two calibers, which is sharper throughout its base portion and blunter at substantially .4S caliber from the tip; the point becoming blunter at the cross-section where said point isV approximately three-fourths caliber in diameter. The radius of curvature of the nose of the projectile decreases progressively from approximately three calibers at .48 caliber from the tip to approximately 1-.15 calibers immediately adjacent the tip.V

From the above description, it will be understood that my invention provides an improved projectile', having a point substantially one and one-third calibers in length; all axial elements of the point comprising a base arc extending through less than two-thirds the length of the point, and variable curve forming` a tip portion blunter than that of a standard ogival point having a uniform radius curvature of two calibers. This providesanvimproved projectile capable of efficiently biting into an armor plate even at large `angles of incidence, and requiring'a decreased velocity and energy for penetration. The improved point minimizes danger of crushing and chipping of the tip, and provides a maxilmum resistance to failure of the projectile by the shearing and compression strains incident to impact.

Having thus described my invention, what I claim as new and desire to secure by Letters-Patent is:

An improved armor-piercing projectile provided with a'nose having an ogival point with a radius adj acent to its tip of approximately l-- calibers, said radius increasing In testimony whereof I afHX my signature prlogressivefly t0 approxiiiatly 3 lclibecs at in presence of two Witnesses.

a engti o approximate y 8 cai er rom said tip, and then having a Xecl curvature ALFRED J SODEN with a radius of approximately 8 calibers Witnesses: for a length of approximately l caliber, sub- WM. H. CAMFIELD, stantially as described. M. A. JOHNSON.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of.Patents,

' Washington, D. C. 

